P07AF - Transmission Fluid Temperature Sensor Circuit Range/Performance Problem in 2016-2019 Ford F-150, Chevrolet Silverado, and Dodge Ram

Quick Answer

P07AF means: P07AF indicates a problem with the transmission fluid temperature sensor circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with P07AF? Immediate attention is recommended to prevent transmission damage.

Common Questions

What does P07AF mean and how does it affect my car?

The P07AF code indicates that there’s a problem with the transmission fluid temperature sensor circuit, meaning the sensor isn't sending accurate temperature data to the TCM. This can lead to poor transmission performance, such as erratic shifting and decreased fuel efficiency. If ignored, it can cause serious transmission damage, leading to costly repairs.

What are the most common causes of P07AF and how much does it cost to fix?

The most common cause of P07AF is a faulty transmission fluid temperature sensor, which has a high chance of affecting your vehicle. Repair costs can range from $150 to $300 for sensor replacement, while wiring repairs may cost between $100 and $250. It's essential to address these issues swiftly to avoid more expensive repairs down the line.

Can I drive my car with P07AF or should I stop immediately?

It's advisable to address the P07AF code as soon as possible. Driving with this code can lead to erratic transmission behavior, which may put additional strain on the transmission and lead to overheating or failure. If your vehicle exhibits severe symptoms, it's best to stop driving until repairs are made.

How can I diagnose P07AF myself using GeekOBD APP?

To diagnose the P07AF code using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Run a complete scan to pull any existing trouble codes and view freeze frame data, which provides context around when the code was triggered. Pay attention to the temperature readings and check the live data for the fluid temperature sensor to identify any discrepancies.

What vehicles are most commonly affected by P07AF?

The P07AF code is frequently encountered in models like the 2016-2019 Ford F-150, Chevrolet Silverado, and Dodge Ram. These vehicles often have similar transmission systems, which can lead to common issues related to their fluid temperature sensors.

How can I prevent P07AF from happening again?

Regular maintenance is key to preventing the P07AF code. Check and change your transmission fluid at recommended intervals, inspect wiring and connectors during routine checks, and address any transmission performance issues promptly. Keeping your vehicle's software updated can also help prevent electronic glitches.

What is P07AF?

The diagnostic trouble code P07AF indicates a transmission fluid temperature sensor circuit issue, signaling that the transmission control module (TCM) has detected a problem with the range or performance of the fluid temperature sensor. In simpler terms, this means that the TCM is not receiving the correct temperature readings from the transmission fluid temperature sensor, which can lead to improper transmission operation. The transmission fluid temperature plays a crucial role in the performance and longevity of your vehicle's transmission system, as it affects shifting patterns and overall efficiency. If the fluid is too hot or too cold, it can cause a range of problems, such as slipping gears, delayed shifting, or even causing the transmission to go into 'limp mode' to prevent further damage. This issue is particularly prevalent in vehicles like the 2016-2019 Ford F-150 and Chevrolet Silverado, where the sensor may be located near the transmission cooler. Drivers experiencing issues with P07AF may notice a decrease in fuel efficiency and erratic shifting behavior, which can be frustrating and potentially harmful to the vehicle. It's important to address this code promptly to ensure your vehicle remains safe and reliable on the road.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P07AF is present:

  • Check engine light stays on constantly, indicating a persistent issue with the transmission system.
  • Engine hesitates during acceleration, which can lead to a jerky ride and reduced performance.
  • Fuel economy decreased by 10-15%, making your trips more costly and less efficient.
  • Transmission shifts roughly or unexpectedly, leading to a less smooth driving experience.
  • Potential overheating of the transmission, which can lead to severe damage if not addressed.

Possible Causes

Most common causes of P07AF (ordered by frequency):

  1. Faulty transmission fluid temperature sensor (70% likelihood) - The sensor may fail due to wear and tear or electrical issues, leading to inaccurate readings.
  2. Wiring issues or poor connections (20% likelihood) - Damaged wires or loose connections can disrupt the signal between the sensor and TCM.
  3. Faulty TCM (5% likelihood) - Though less common, a malfunctioning TCM can cause similar symptoms and trigger the P07AF code.
  4. Transmission fluid contamination (3% likelihood) - Old or contaminated fluid can affect sensor performance and transmission operation.
  5. Rare but possible: Software issues (2% likelihood) - Occasionally, software glitches in the vehicle's computer can lead to erroneous codes.

P07AF Repair Costs

Cost Breakdown by Repair Type

Sensor Replacement

Replacing the faulty transmission fluid temperature sensor.

  • Total: $150 - $300
  • Success rate: 90%
Wiring Repair

Repairing any damaged wiring or connections related to the sensor.

  • Total: $100 - $250
  • Success rate: 85%
Money-Saving Tips for P07AF
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P07AF Diagnosis Process

Follow these systematic steps to accurately diagnose P07AF. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use multimeter or specific diagnostic tools to test the transmission fluid temperature sensor (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test the transmission fluid temperature sensor (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Faulty Sensor Replacement in a 2017 Ford F-150

Vehicle: 2017 Ford F-150, 45,000 miles

Problem: Customer complained of erratic shifting and check engine light.

Diagnosis: Diagnosed with P07AF after scanning OBD2 and testing the transmission fluid temperature sensor.

Solution: Replaced the faulty transmission fluid temperature sensor and cleared the codes.

Cost: $250 (including parts and labor)

Result: The vehicle shifted smoothly post-repair, and the check engine light did not return.

Case Study 2: Wiring Repair for a 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 30,000 miles

Problem: Check engine light was on, and the driver noticed poor acceleration.

Diagnosis: P07AF was retrieved, and visual inspection found damaged wiring leading to the sensor.

Solution: Repaired the damaged wiring and secured all connections.

Cost: $150 (for wiring repair)

Result: The issue was resolved, and the vehicle's performance returned to normal.

Diagnose P07AF

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: P07AF
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes